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Tiles tear off please help

Hi 2 hours ago i was grinding my 8" F6 mirror, process was going fine then suddenly my son show me that 4 tiles are wearing off and red color brick like material is coming out behind the smooth face of tiles. It looks to me that smooth face of tiles is wearing n tearing off.
This is very looking like bricks. I am using ceramics tiles.

Coach me friend, what should i do now and my camera is also damaged otherwise i shows u all the image.

You have glazed clay tiles and once the glazing wears off they don't really work, sadly, as the brick-like stuff isn't hard enough. You want ceramic tiles which are essentially glazed all the way through.

Hi Sam and Mark.
Rock says he is using ceramic tiles so I've taken him at his word. The ones I use have a glazing on the surface which wears off but under that is still very hard and I've had no problem with chipping, scratching etc.

Rock, try using glass tiles like these. It's best to use clear ones. They also come preattached so they handle like one a sheet, and can be cut to size and epoxied at once. You can buy then in home improvement stores.